Magnetorotational instability (MRI) triggers turbulence and enables outward transport of angular momentum in hydrodynamically stable accretion discs. By using the WKB approximation and methods of singular function theory, we resolve two different paradoxes of MRI that appear in the limits of infinite and vanishing magnetic Prandtl number. For the latter case, we derive a strict limit of the cri...

Neuronal responses to sensory stimuli or neuronal responses related to behaviour are often extracted by averaging neuronal activity over large number of experimental trials. Such trial-averaging is carried out to reduce noise and to diminish the influence of other signals unrelated to the corresponding stimulus or behaviour. However, if the recorded neuronal responses are jittered in time with ...

If the electroweak sector of the standard model is described by classically conformal dynamics, the early Universe evolution can be substantially altered. It is already known that-contrarily to the standard model case-a first-order electroweak phase transition may occur. Here we show that, depending on the model parameters, a dramatically different scenario may happen: A first-order, six massle...

CONTEXT Delirium impedes communication and contributes to symptom distress in patients with advanced cancer. There are few prospective data on the reversal of delirium in this population. OBJECTIVES To evaluate the occurrence, precipitating factors, and reversibility of delirium in patients with advanced cancer. DESIGN Prospective serial assessment in a consecutive cohort of 113 patients wi...

OBJECTIVE: To determine frequency of common precipitating factors for Hepatic encephalopathy in chronic liver disease. PLACE AND DURATION OF STUDY: This study was conducted at Civil Hospital Karachi over a period of six months from June 2009 to December 2009. PATIENTS AND METHODS: This cross sectional study was conducted in Medical wards of Civil Hospital Karachi over a period of six months fro...

Sleeping animals do not move or feed and are less responsive. In Caenorhabditis elegans, a single neuron triggers sleep. A recent study shows that the neuron releases several neuropeptides - each with distinct sleep behavioral effects - to promote the collection of behaviors that is sleep.

We review the latest research investigating how people explain their own actions when they have been activated nonconsciously. We will discuss evidence that when nonconsciously activated behavior is unexpected (e.g., norm- violating, against self -standards), negative affect arises and triggers confabulations aimed to explain the behavior. Nonconsciously activated behaviors may provide a window...